Understanding Marginal Tax Brackets

A marginal tax bracket applies its rate only to the income within that bracket, not to your entire income. This means tax brackets alone can never make a raise lower your take-home pay: only the dollars above a threshold are taxed at the higher rate, while everything below it keeps its lower rate.

Updated October 2026: This guide has been refreshed with the IRS figures for tax year 2026 (for returns filed in 2027). The bracket thresholds and standard deductions in the 2026 section below are for tax year 2026.

The myth worth putting to rest

A persistent worry is that earning a little more will “bump you into a higher bracket” and leave you with less money overall. Under a progressive income-tax system, that does not happen from tax brackets alone. Brackets are marginal — the higher rate touches only the slice of income above each cutoff.

How marginal brackets actually work

Imagine a simplified system with two rates: 10% on the first $10,000 of income and 20% on anything above $10,000. This is a simplified illustration, not an IRS bracket table — the real 2026 thresholds are in the next section. If you earn $12,000:

• The first $10,000 is taxed at 10% = $1,000
• The next $2,000 is taxed at 20% = $400
• Total tax = $1,400, an effective rate of about 11.7% — not 20%

Your marginal rate (the rate on your next dollar) is 20%, but your effective rate (tax across all income) is much lower. A raise is taxed at your marginal rate, so you always keep the majority of it.

The 2026 federal brackets and standard deduction

For tax year 2026, the federal rates are still 10%, 12%, 22%, 24%, 32%, 35% and 37%, applied to taxable income (income after deductions). Each rate applies only to income above these thresholds:

• 10% — up to $12,400 (single) / $24,800 (married filing jointly)
• 12% — over $12,400 / $24,800
• 22% — over $50,400 / $100,800
• 24% — over $105,700 / $211,400
• 32% — over $201,775 / $403,550
• 35% — over $256,225 / $512,450
• 37% — over $640,600 / $768,700

The standard deduction for tax year 2026 is $16,100 for single filers (and married filing separately), $32,200 for married couples filing jointly, and $24,150 for heads of household. Taxable income is worked out after this deduction, so the thresholds above apply to what is left.

Worked example for 2026: a single filer with $60,000 of taxable income pays 10% on the first $12,400 ($1,240), 12% on the next $38,000 ($4,560), and 22% on the remaining $9,600 ($2,112) — $7,912 in total. That is an effective rate of about 13.2%, even though the marginal rate is 22%.

What federal income tax looks like at common salaries

The table runs the 2026 brackets for a single filer whose only income is wages and who takes the $16,100 standard deduction. It leaves out credits, pre-tax retirement contributions and state tax, so treat it as a starting point rather than your exact bill.

Effective rate here is federal income tax divided by salary. Notice how far it sits below the marginal rate at every level: someone on $100,000 is in the 22% bracket but pays about 13% of their salary in federal income tax.

Marginal versus effective rate

These two numbers are often confused:

• Marginal rate — the rate applied to your next dollar of income. Useful for deciding what a raise is worth.
• Effective rate — total tax divided by total income. Useful for understanding your overall burden.

When you estimate the take-home value of a raise, the marginal rate is the relevant one, which is why a single blended “deduction rate” is only ever an approximation.

How much of a raise you actually keep

A raise is taxed at your marginal rate, plus payroll tax. Employees pay 6.2% Social Security tax on wages up to $184,500 in 2026 and 1.45% Medicare tax on all wages, so 7.65% for most people. Above $184,500 the Social Security part stops, and above $200,000 an extra 0.9% Medicare tax starts.

*You keep = what is left of a $5,000 raise after federal income tax and Social Security and Medicare (SS + Medicare), before state tax. The 10% to 24% rows assume your wages stay under $184,500, so the full 7.65% applies. The 32% bracket and above start at wages of roughly $218,000 for a single filer, so those rows use 1.45% Medicare plus the 0.9% additional Medicare tax. State income tax comes on top in most states, from nothing in states such as Texas and Florida to several percent elsewhere.

Worked example: a raise that crosses a bracket line

A single filer has $49,000 of taxable income and gets a $3,000 raise, taking them to $52,000. The 22% bracket starts at $50,400, so the raise is split:

• The first $1,400 stays in the 12% bracket: $168 tax
• The remaining $1,600 falls in the 22% bracket: $352 tax
• Federal income tax on the raise: $520. Social Security and Medicare: $229.50
• You keep $2,250.50 of the $3,000, about 75%, before any state tax

Crossing the line cost $160 more than if the whole raise had stayed at 12%. It did not touch the tax on the first $49,000, and the raise still leaves you $2,250.50 better off.

Estimate your raise after deductions →

Related reading: work through how to calculate a salary increase, check how much is a raise per paycheck, and see how a raise vs bonus compares, including how a bonus is taxed.

The real caveat: it is not only about tax brackets

While brackets themselves never cause a net loss, some income-linked benefits, credits, subsidies, and repayment thresholds can phase out as income rises. These are separate from tax brackets and can affect a household’s overall position. If a raise sits near one of those thresholds, it is worth checking your specific situation with a qualified professional.

Common questions

Sources

• IRS — Federal income tax rates and brackets
• IRS — Tax inflation adjustments for tax year 2026 (IR-2025-103, October 9, 2025; Revenue Procedure 2025-32)
• IRS — Topic 751, Social Security and Medicare withholding rates
• Social Security Administration — Contribution and benefit base ($184,500 for 2026)

Sources checked October 2026: IRS News Release IR-2025-103 (October 9, 2025) and Revenue Procedure 2025-32, announcing the tax year 2026 inflation adjustments. Tax brackets and thresholds change by tax year and are set by the IRS. This guide explains how marginal rates work and is not tax advice.